US10834680B2 - Method for controlling a radio signal emitted by a gateway, and corresponding gateway and computer program - Google Patents

Method for controlling a radio signal emitted by a gateway, and corresponding gateway and computer program Download PDF

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US10834680B2
US10834680B2 US16/469,983 US201716469983A US10834680B2 US 10834680 B2 US10834680 B2 US 10834680B2 US 201716469983 A US201716469983 A US 201716469983A US 10834680 B2 US10834680 B2 US 10834680B2
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gateway
radio signal
zone
controller
signal emitted
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US20200092729A1 (en
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Mohamed Boucadair
Christian Jacquenet
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Orange SA
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Orange SA
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • H04W12/001—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/16—Gateway arrangements

Definitions

  • the field of the invention is that of telecommunications and more particularly that of adapting the range of the radio signal emitted by a residential gateway or by connected things (context of services deployed on Internet of Things.
  • the invention is therefore applicable in any communication network implementing at least one residential gateway (domestic or enterprise) having one or more radio components capable of transmitting and receiving waves of various kinds: Wi-Fi, Bluetooth, NFC (Near Field Communication), 4G (3GPP LTE version 13 and above), LoRa® WAN (Long Range Wide-area Network)), etc.).
  • residential gateway domestic or enterprise
  • radio components capable of transmitting and receiving waves of various kinds: Wi-Fi, Bluetooth, NFC (Near Field Communication), 4G (3GPP LTE version 13 and above), LoRa® WAN (Long Range Wide-area Network)), etc.
  • IP Internet Protocol
  • a residential gateway also called “box”, HG for “Home Gateway” or CPE for “Customer Premises Equipment”, is conventionally installed in the home of a user.
  • a residential gateway serves as interface between the local area network of the user and the IP network of an operator. It is therefore the hub element through which passes all of the connections, the traffic characteristic of the different services subscribed to by the client, and which also supports a set of applications provided by a telecommunications operator.
  • a residential gateway allows a user to access multiple IP services simultaneously allowing access to the Internet, to video contents (including broadcast television programs) and to voice services (telephony over IP, for example).
  • the corresponding commercial offering is conventionally called Triple Play and, more broadly, Multi-play.
  • the residential gateway is connected on one side to the network of the operator and provides, on the client side, a varied set of interfaces: wireless interfaces (e.g. WLAN, Bluetooth (registered trademark), etc.), RJ11 socket for telephony, RJ45 sockets for digital television and computers, USB (Universal Serial Bus) sockets, Ethernet ports.
  • wireless interfaces e.g. WLAN, Bluetooth (registered trademark), etc.
  • RJ11 socket for telephony e.g. WLAN, Bluetooth (registered trademark), etc.
  • RJ45 sockets for digital television and computers
  • USB Universal Serial Bus
  • the residential gateway In addition to providing access to all of the services (data, video, voice) subscribed to by the client, the residential gateway is also involved in the management of the functions that it supports (for example management of the NAT (Network Address Translator) address translation rules, of the firewall filters, etc.).
  • NAT Network Address Translator
  • the residential gateway incorporates the software used for the gateway maintenance operations.
  • Wi-Fi registered trademark
  • Such a gateway comprises an administration interface, generally accessible by the HTTP (HyperText Transfer Protocol) protocol but this interface is largely unknown to most of the users.
  • HTTP HyperText Transfer Protocol
  • radio transmission and reception components embedded in them which allow them to process the commands originating from a controller (for example, a Smartphone, a local console, etc.) connected somewhere to the Internet or within the service zone delimited by the range of the radio signal emitted by the gateway.
  • the radio components are also used by these connected things to transmit to a controller, either regularly (for example, monthly collection from the electricity meter), or spontaneously (for example, sending of a notification to a controller when a biometric data threshold is on the point of being exceeded), all of the data that they have collected.
  • these components are used to receive instructions from a controller such as instructions to switch on, switch to standby, etc.
  • One emblematic (and proven) risk of such security failings is that linked to the presence of a person having a smartphone embedding a “controller” function capable of controlling connected things in proximity to a residence within which a network of connected things (lamps) relying on the LoRa ® specification is deployed to manage the lighting system: this person theoretically has the capacity to control the lighting system of said residence as he or she pleases, if the connected things are situated within the control range of the controller of this person.
  • the service zone corresponding to the range of the signals emitted by the connected things can't be summarized as an isotropic space: the controlled management of the range of the signals emitted by such things must rely on a prioritized direction of the space used by the things and their controller. Such information can be exchanged when a connected thing is first commissioned.
  • the products targeted in this attack are “Hue light” lamps controlled via a wireless communication of Zigbee type.
  • the attack made it possible to show that, by using a drone situated in proximity to one of the lamps, it had been possible to spread a contaminating virus in the network of lamps and thus control the switching on and the switching off of the lamps from a device embedded on the drone.
  • the subject of the invention is a method for controlling a radio signal emitted by a device to adapt its range.
  • the method comprises:
  • the zone is by default the zone covered by the device.
  • This device is for example a gateway and this gateway has the controller embedded in it.
  • Each gateway, residential or not, can register input from a user.
  • the residential gateway registers a data describing the environment of the user of this gateway.
  • the data describing the environment can consist of information on the dimension of the environment of the user. For example, it relates to a distance between the residential gateway and the external walls of the residence of the user. This distance delimits a volume considered as the environment of the user which determines the zone.
  • the gateway can automatically adjust its range to the limit of this zone.
  • the gateway can determine the power at the limit of the zone.
  • the gateway can then adjust the emitted power for the power at the limit of the zone to be below a minimum reception threshold admissible by a terminal which wants to be associated with the gateway.
  • an electronic device for example a drone
  • the residence for example, it can not be associated with the gateway given that radiated signal at this limit is below a signal level necessary to establish a connection.
  • the device can be a thing connected to a local area network and controlled by a controller.
  • a gateway can have the controller of the device embedded in it or be connected to such a controller embedded in an electronic device such as a smartphone.
  • the radiation zone of the thing can then correspond to the determined zone, to a sub-zone of the determined zone or to a different zone.
  • the zone of service of the connected thing can be defined independently of the service zone of a gateway.
  • the method can be activated by a connecting thing with or without the presence of a gateway in the user environment.
  • the gateway comprises:
  • Another subject of the invention is a communication system comprising a residential gateway for controlling a radio signal emitted by the gateway.
  • the system is such that the gateway is in accordance with a preceding subject.
  • the proposed method thus provides a robust solution for limiting attacks on a connected thing (or a set of connected things) without making any assumption as to the robustness of the security mechanism supported or as to the software maintenance cycle, by controlling the range of the communications of such a connected thing.
  • the zone is determined by receiving and using location information transmitted by a mobile terminal moved between points at the limit of the zone to be delimited.
  • a residential gateway has the controller embedded in it.
  • the method further comprises:
  • the method further comprises:
  • the method further comprises:
  • the method further comprises:
  • Each gateway residential in particular, can register preferences of the user as to his or her environment.
  • the function of the preferences on the environment is to specify radiation modalities of the residential gateway.
  • the user can for example define a time band of radiation or of non-radiation of his or her residential gateway and a time of validity of these preferences (period excluding weekend).
  • the preferences have default values. By default, they can authorize the adaptation of the range (power, frequency, antenna gain, etc.).
  • the device is a connected thing.
  • the method further comprises:
  • the device has the controller embedded in it.
  • the comparison to a threshold is repeated.
  • the repeating of the comparison at more or less regular instants allows for an adaptation to changes in the environment, for example the moving of a piece of furniture which has the effect of increasing or reducing the attenuation of the emitted signal and therefore of modifying the range.
  • a residential gateway according to the invention is particularly well suited to implementing the method as described previously.
  • a gateway can have different features relating to the method according to the invention, these features being able to be combined or taken in isolation.
  • Another subject of the invention is one or more computer programs comprising instructions for implementing at least one method as described above when this program or these programs are run by a processor.
  • Another subject of the invention is one or more information media, non-removable, or partially or totally removable, that can be read by a computer, and comprising instructions of one or more computer programs for executing the steps of at least one method as described above.
  • the method according to the invention can therefore be implemented in various ways, particularly in hardwired form and/or in software form.
  • FIG. 1 is a diagram illustrating the radiation zone or service zone of a Wi-Fi gateway
  • FIG. 2 is a flow diagram of the main steps of a method according to the invention.
  • FIGS. 3 a -3 d represent diagrams illustrating an embodiment according to which the retrieval of location coordinates of a tracer associated with the gateway makes it possible to delimit the zone
  • FIG. 4 is a diagram illustrating the default radiation zone of a Wi-Fi gateway and the zone after optimization, i.e., the adaptation of its range and the positioning of two terminals of which one, TI (internal terminal), is within the optimized zone, and the other, TE (external terminal), is outside of the optimized zone,
  • TI internal terminal
  • TE external terminal
  • FIGS. 5 and 6 are diagrams of protocol interchanges according to embodiments of the invention according to which the method requires the geographic coordinates of the terminal upon its attachment to the network or the geographic coordinates of the controller upon its association with a connected thing,
  • FIG. 7 is a diagram illustrating an embodiment of the method according to which streams from terminals are redirected to a server by application of rules (policy),
  • FIG. 8 is a diagram of the simplified structure of a residential gateway according to the invention suitable for implementing a control method according to the invention.
  • the general principle of the invention relies on the adaptation of the range of the signal emitted by a device, in particular a gateway or a connected thing, to reduce the risk of fraudulent use by a third-party device.
  • a third-party device can be a drone which approaches at a distance from or as close as possible to the residential environment.
  • the optimizing of the coverage to the residential environment of the user of the gateway already makes it possible to reduce the above risk.
  • the coverage can of course be limited to a zone which is not identical to the residence, but more restricted or more expansive. For example, this zone can be limited to a room or extended to several rooms of several apartments.
  • the zone covered can be restricted, extended, even focused, and therefore the range can be adapted by modifying, for example, the transmitted power, the transmission frequency or, for example, by effecting beamforming or spatial coding.
  • the coverage zone can thus be controlled using a plurality of unidirectional antennas. It can of course be implemented a combination of these means to adapt the zone covered and therefore the range.
  • the control of the emitted signal makes it possible to adapt the range of this signal and therefore the zone covered to cover a so-called optimal service zone. Reducing the range can thus make it possible for the radiated energy to no longer be sufficient for a device such as a drone to be able to detect the signal and fraudulently connect to a remote network via the gateway or simply be introduced into a local area network accessible via the gateway.
  • the residential gateway can also take into account preferences of radiation on its environment as expressed by its user to adapt the range of its emitted signal.
  • the radiation zone can become nil by cutting the emission of the signal, for example at night.
  • the invention is described in more detail in the context of a Wi-Fi gateway, that is to say one emitting a signal conforming to at least one of the standards from the IEEE802.11 family.
  • FIG. 1 schematically illustrates the service zone Zdef or zone covered by a gateway which defines the range of this gateway. It is well understood that, in reality, the coverage or range does not follow a perfect geometrical form as represented in the figure but has an irregular profile which depends on the environment: walls, floors, nature of the walls and of the floors, distance to the walls, etc.
  • the main steps of the invention are illustrated by the flow diagram of FIG. 2 .
  • the description below considers that the device and the gateway are one and the same unless indicated otherwise.
  • the method 1 controls the radio signal emitted by a gateway CPE to adapt its range. It is of course understood that a gateway can emit several different radio signals which can also be simultaneous depending on the capabilities of the gateway. For example, the gateway can emit a signal of Wi-Fi type simultaneously with a signal of Bluetooth or Zigbee type. The method can be deployed to control several signals emitted by the same gateway.
  • the method 1 comprises the determination 2 by the gateway of a level Wi-Fi_level of radio signal emitted at the limit of a determined zone.
  • the signal is that emitted by the gateway.
  • the gateway controls the signal emitted by a distinct device.
  • the function of determination of the range of a local radio interface and the function of controlling an interface embedded in a third-party device can be co-located or embedded in different devices.
  • the gateway displays a zone, which is, by default, the Wi-Fi coverage zone.
  • a human-machine interface can allow the user to input data descriptive of the environment which define the zone to be taken into account.
  • the descriptive data are retrieved via a communication with a tracer moved at the limit of the zone to be covered.
  • Other management interfaces can be used, such as a display screen on the front panel of a gateway or a pair of smart glasses associated with the residential gateway.
  • the gateway can be connected to one or more devices having a human-machine interface and/or a graphical interface such as a television screen, a PC, a tablet, a smartphone on which the zone can possibly be displayed and by means of which the user can perform the inputting via a remote control, a keyboard, etc.
  • a human-machine interface and/or a graphical interface such as a television screen, a PC, a tablet, a smartphone on which the zone can possibly be displayed and by means of which the user can perform the inputting via a remote control, a keyboard, etc.
  • the gateway determines the emitted power level at a distance which corresponds to the limit of the zone.
  • the method 1 further comprises the comparison 3 of the emitted signal at the zone limit to a determined threshold: ⁇ s E ⁇ >th. And if Y the emitted signal S E exceeds the threshold th then the gateway CPE commands REDUCE_Cde an adaptation of the range of the emitted radio signal.
  • the value of the threshold can be, by default, the minimum detection threshold set for example in one of the IEEE 802.11 standards.
  • the method 1 can further comprise the registration 4 by the gateway CPE of data zone descriptive of an environment of a user of this gateway.
  • the user can input data describing the residence.
  • the user can be plural; it is not necessarily the same physical person who uses the gateway and who inputs the description data.
  • the data describing the environment make it possible to determine the outlines of the environment of the user to be considered.
  • the data can comprise a type of residence (house, apartment), a number of rooms to be considered, an overall floor area to be considered, a number of floors to be considered, a number of rooms per floor to be considered, the location of the gateway in the residence, etc.
  • the limit of the zone is identified at the outlines of the environment.
  • the gateway can propose to the user, via a management interface IHM, a mode which relies on the retrieval of location coordinates of a mobile terminal or tracer TR associated with the gateway CPE.
  • This tracer can be a Wi-Fi client embedded in an existing terminal (smartphone, portable PC) or transported by a drone, or can be a dedicated device which is associated with the gateway CPE solely for Wi-Fi calibration purposes.
  • the user is prompted START TRACE? to move or have the tracer moved to delimit the outlines of the environment and thus define the data zone.
  • the tracer regularly transmits its new location coordinates, for example GPS (Global Positioning System) (or coordinates for which the location of the gateway is the reference) which allow the gateway CPE to determine the outlines of the environment and therefore the limit of the desired service zone Zsouh. Knowing its location, for example its own location coordinates, the gateway can position the zone relative to its own location.
  • the gateway CPE prompts Optim. Wi-Fi? the user to activate the Wi-Fi coverage zone optimization procedure. Once this modification is finished, Wi-Fi optim, the gateway can display the new service zone Zopt.
  • the gateway If the gateway is moved, the change of its location automatically makes it possible to move the zone. However, the user can be prompted to run a new step of registration by the gateway CPE of data zone descriptive of the new environment. This step of interaction with the user is not necessary if the gateway has an accelerometer embedded in it, the aim of which is to adjust the new location of the gateway to keep the radiation of the radio interfaces to the service zone defined previously by the user.
  • a client optimizes the range of the Wi-Fi signal of his or her gateway CPE as illustrated by FIG. 4 .
  • He or she thus in particular has the possibility of limiting the access to the services offered by or via his or her gateway CPE to only the terminals TI present within the service zone and duly authorized to benefit from the services provided by or via the gateway.
  • the terminals TE external to the service zone are no longer able to initialize radio attachment attempts with the gateway CPE.
  • the tracer can be used to check whether the new service zone (that is to say after optimization) conforms to the service zone as entered by a user.
  • An additional or alternative precaution for limiting the access to the services offered by or via the gateway CPE to only the terminals located within a determined zone consists in requiring the geographic coordinates of the terminal upon its attachment to the network managed by the gateway. This procedure can even be deployed if the gateway CPE has data describing the zone but does not have a mechanism for limiting the range of the radio signal to this zone. The method 1 can thus prohibit 5 any association or connection authorization subject to receiving the location of the terminal and this location being included within the zone.
  • the gateway CPE On reception of the coordinates coming from the terminal, the gateway CPE checks whether the terminal is situated within or outside of the service zone configured by default or configured by the user. Thus, the access to the services offered or via the gateway CPE is authorized following this check only to the terminals situated within the service zone. This measure reinforces the control ensured by the method 1 according to the invention.
  • the method 1 can further comprise the registration 4 by the residential gateway CPE of preferences LOCAL_PREF of a user of this gateway CPE on his or her environment.
  • the function of the preferences on the environment is to specify the radiation modalities of the residential gateway.
  • the preferences LOCAL_PREF of a user of the residential gateway relate to his or her preferences regarding the activation or the deactivation of the Wi-Fi interface of his or her own residential gateway.
  • LOCAL_PREF relates to the activation bands of the Wi-Fi interface of his or her gateway CPE.
  • the connections originating from a terminal situated outside of a service zone are relayed by the gateway CPE to a dedicated server of the operator of a communication network to which the gateway accesses as illustrated by FIG. 7 .
  • This server is responsible for fraud detection and for the collection of information which make it possible to identify a malicious user (collection of MAC addresses, simulation of a successful attempt to access the network, etc.).
  • the gateway CPE redirects the connections received by a terminal TE to a server SERV of the operator using filters which are activated in the gateway CPE.
  • the traffic from the external terminal TE is then sent to a dedicated platform P of the operator for more advanced processing such as, for example, the collection of useful data to identify the user TE, the backing up of a trace of the fraudulent connection attempts, etc.
  • a dedicated platform P of the operator for more advanced processing such as, for example, the collection of useful data to identify the user TE, the backing up of a trace of the fraudulent connection attempts, etc.
  • this procedure can be activated/deactivated on demand, for a portion of the traffic, or according to other criteria specific to the gateway CPE or instructed by the operator.
  • a controller for managing these things is used to make a service (management of the lighting system, management of the heating system, management of the smoke or motion detectors, etc.) accessible within the service zone.
  • This controller can be embedded in the gateway or in another electronic device.
  • the gateway with an actuator or controller function embedded is capable of generating commands intended to modify the range of the things connected within a network to which the gateway is also connected.
  • the very great majority of the connected things have a microcontroller MCU (or Micro Controller Unit) and a regulator LDO (Low Dropout Voltage) embedded.
  • the microcontroller MCU makes it possible in particular to manage the transmission power of the radio components but also the energy consumed.
  • the regulator LDO can be parameterized to make it possible to optimize the life of the batteries (for example when the batteries are AA or AAA batteries) embedded in the thing by acting in particular on the power of the emitted signal.
  • the deployment of such connected things was done first of all in an industrial context (networks of sensors on a production site) then in a metropolitan context (management of the light system of the Olympic sites in Beijing in 2008, for example) and then, little by little, in a domestic context.
  • the range of the waves generated by the connected things is thus calibrated by the controller according to the coverage zone of the service or services provided by the things. If the controller is embedded in a gateway, the zones covered by these things can constitute a subzone of the service zone calibrated by the gateway. Each thing is therefore a device for which the method can adapt the emitted signal.
  • This subzone is for example delimited by the location of the sensors according to the outfitting of the residence and the nature of the service that they provide.
  • the security risks linked to the deployment of a network of connected things requires the service zone not to be an isotropic space: in effect, a direction within the space corresponding to the service zone must always be prioritized to ensure that only the controller of the user is duly authorized to send commands to all of the connected things placed under its operational responsibility.
  • This precaution makes it possible in particular to minimize the risks of attacks linked to the presence of (external) devices likely to generate commands to the connected things when these devices are located in proximity (for example, a drone situated in proximity to the residence of the user) or are even located in the service zone delimited by the gateway (for example, because of the presence of a visitor having a smartphone with the controller function embedded).
  • the calibration relies on the sending by the controller of a first message SET_DIRECTION() intended to inform the connected things of the direction prioritized in the space within the service zone (North, North-East, East, South, South-West, etc.) to communicate with the controller by virtue of the location of the connected thing. Then, the calibration of the range of the signals emitted by the connected things relies on the sending of a message SET_RANGE() by the controller.
  • a variant consists in including in the control messages the geographic coordinates of the controller.
  • the transmission of these coordinates allows the connected thing to check whether the controller is situated within the service zone or outside given that the thing knows the service zone.
  • the primitives used to communicate these coordinates are similar to those already described for the case of the gateway CPE.
  • the connected thing can reject any request or command from the controller and thus avoid fraudulent use.
  • FIG. 8 illustrates the simplified structure of a residential gateway CPE implementing a control method according to one of the embodiments described above.
  • the gateway CPE comprises a memory MEM comprising, for example, a buffer memory (RAM), emission and reception means EM/RE for emitting and receiving a radio signal and a processing unit ⁇ P equipped for example with a microprocessor and driven by a computer program Pg implementing the control method.
  • a memory MEM comprising, for example, a buffer memory (RAM), emission and reception means EM/RE for emitting and receiving a radio signal and a processing unit ⁇ P equipped for example with a microprocessor and driven by a computer program Pg implementing the control method.
  • the code instructions of the computer program Pg are for example loaded into the buffer memory before being executed by the microprocessor of the processing unit ⁇ P (calculator).
  • the microprocessor of the processing unit ⁇ R implements the steps of the control method according to the instructions of the computer program Pg to execute, by the processing unit ⁇ P, the determination of a level of radio signal emitted by the gateway CPE at the limit of a determined zone and the command to adapt REDUCE_Cde the range of the radio signal emitted by the gateway according to the comparison of the signal level and of a determined threshold.
  • the gateway is such that the emission means EM/RE are suitable for adapting the emitted signal according to the adaptation command REDUCE_Cde.
  • the gateway can further comprise an interface IHM for the user to input the data Zone describing his or her residential environment and a memory space for saving this information.

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  • Computer Networks & Wireless Communication (AREA)
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FR1662475 2016-12-15
FR1662475A FR3060933A1 (fr) 2016-12-15 2016-12-15 Procede de controle d'un signal radio emis par une passerelle, passerelle et programme d'ordinateur correspondants
PCT/FR2017/053617 WO2018109419A1 (fr) 2016-12-15 2017-12-15 Procédé de contrôle d'un signal radio émis par une passerelle, passerelle et programme d'ordinateur correspondants

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